<!DOCTYPE html>
<HTML>
<HEAD><meta name="viewport" content="width=device-width, initial-scale=1">
<Title>Y Zone Coloring</Title>
<link type='text/css' rel='Stylesheet' href="maxchartapi.css" />
</HEAD>
<body bgcolor="#FFFFFF" text="#000000" topmargin="0" leftmargin="0" rightmargin="0" marginwidth="0" marginheight="0">

<p class="heading0">ChartDirector 7.0 (Java Edition)</p>
<p class="heading1">Y Zone Coloring</p>
<hr class="separator">
<div class="content">
<img src="images/yzonecolor.png" width='500' height='300'>
<br><br>
This example demonstrates using y zone colors - colors that change at certain y value thresholds.<br><br>
In this example, a y zone color is used as the fill color of an area layer, so that the area fill color changes above a certain threshold.<br><br>
Y zone colors are created using <a href="Layer.yZoneColor.htm">Layer.yZoneColor</a>. You can use a y zone color in any ChartDirector API that expects a color. For instance, you can use a y zone color as background color, fill color of data sets, line color, etc.<br><br>
A single y zone color can support one threshold value and change between two colors. The two colors can be any colors, including another y zone color. You may create y zone colors with multiple thresholds by cascading multiple y zone colors this way.
</div>
<p class="heading1a">Source Code Listing</p>
<div class="content">
<b>[JSP Version]</b> jspdemo/yzonecolor.jsp
<div class='codeblock'><code class='pre'>&lt;%@page import="ChartDirector.*, java.util.*" %&gt;
&lt;%
// The data for the chart
double[] data = {30, 28, 40, 55, 75, 68, 54, 60, 50, 62, 75, 65, 75, 89, 60, 55, 53, 35, 50, 66, 56,
    48, 52, 65, 62};

// The labels for the chart
String[] labels = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14",
    "15", "16", "17", "18", "19", "20", "21", "22", "23", "24"};

// Create a XYChart object of size 500 x 300 pixels, with a pale yellow (0xffffc0) background, a
// black border, and 1 pixel 3D border effect
XYChart c = new XYChart(500, 300, 0xffffc0, 0x000000, 1);

//Set search path to current JSP directory for loading icon images
c.setSearchPath(getServletConfig().getServletContext(), request);

// Set the plotarea at (55, 50) and of size 420 x 205 pixels, with white background. Turn on both
// horizontal and vertical grid lines with light grey color (0xc0c0c0)
c.setPlotArea(55, 50, 420, 205, 0xffffff).setGridColor(0xc0c0c0, 0xc0c0c0);

// Add a legend box at (55, 25) (top of the chart) with horizontal layout. Use 8pt Arial font. Set
// the background and border color to Transparent.
LegendBox legendBox = c.addLegend(55, 25, false, "", 8);
legendBox.setBackground(Chart.Transparent);

// Add keys to the legend box to explain the color zones
legendBox.addKey("Normal Zone", 0x8033ff33);
legendBox.addKey("Alert Zone", 0x80ff3333);

// Add a title box to the chart using 13pt Arial Bold Italic font. The title is in CDML and includes
// embedded images for highlight. The text is white (0xffffff) on a black background, with a 1 pixel
// 3D border.
c.addTitle(
    "&lt;*block,valign=absmiddle*&gt;&lt;*img=star.png*&gt;&lt;*img=star.png*&gt; Y Zone Color Demo " +
    "&lt;*img=star.png*&gt;&lt;*img=star.png*&gt;&lt;*/*&gt;", "Arial Bold Italic", 13, 0xffffff).setBackground(
    0x000000, -1, 1);

// Add a title to the y axis
c.yAxis().setTitle("Energy Concentration (KJ per liter)");

// Set the labels on the x axis.
c.xAxis().setLabels(labels);

// Display 1 out of 3 labels on the x-axis.
c.xAxis().setLabelStep(3);

// Add a title to the x axis using CDML
c.xAxis().setTitle("&lt;*block,valign=absmiddle*&gt;&lt;*img=clock.png*&gt;  Elapsed Time (hour)&lt;*/*&gt;");

// Set the axes width to 2 pixels
c.xAxis().setWidth(2);
c.yAxis().setWidth(2);

// Add an area layer to the chart. The area is using a y zone color, where the color is
// semi-transparent green below 60, and semi-transparent red above 60.
c.addAreaLayer(data, c.yZoneColor(60, 0x8033ff33, 0x80ff3333));

// Add a custom CDML text at the bottom right of the plot area as the logo
c.addText(475, 255,
    "&lt;*block,valign=absmiddle*&gt;&lt;*img=small_molecule.png*&gt; &lt;*block*&gt;&lt;*font=Times New Roman Bold " +
    "Italic,size=10,color=804040*&gt;Molecular\nEngineering&lt;*/*&gt;").setAlignment(Chart.BottomRight);

// Output the chart
WebChartViewer viewer = new WebChartViewer(request, "chart1");
viewer.setChart(c, Chart.SVG);

// Include tool tip for the chart
viewer.setImageMap(c.getHTMLImageMap("", "", "title='Hour {xLabel}: {value} KJ/liter'"));
%&gt;
&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;title&gt;Y Zone Coloring&lt;/title&gt;
    &lt;!-- Include ChartDirector Javascript Library to support chart interactions --&gt;
    &lt;script type="text/javascript" src="cdjcv.js"&gt;&lt;/script&gt;
&lt;/head&gt;
&lt;body style="margin:5px 0px 0px 5px"&gt;
    &lt;div style="font:bold 18pt verdana;"&gt;
        Y Zone Coloring
    &lt;/div&gt;
    &lt;hr style="border:solid 1px #000080; background:#000080" /&gt;
    &lt;div style="font:10pt verdana; margin-bottom:1.5em"&gt;
        &lt;a href="viewsource.jsp?file=&lt;%=request.getServletPath()%&gt;"&gt;View Source Code&lt;/a&gt;
    &lt;/div&gt;
    &lt;!-- ****** Here is the chart image ****** --&gt;
    &lt;%= viewer.renderHTML(response) %&gt;
&lt;/body&gt;
&lt;/html&gt;</code></div>
</div>
<br><hr class="separator"><div class="copyright">&copy; 2022 Advanced Software Engineering Limited. All rights reserved.</div>
</body>
</HTML>
